An HSA works like an IRA, except that money is used to pay health care costs. Participants enroll in a relatively inexpensive high deductible insurance plan. Then, a tax-deductible savings account may be opened to cover current and future medical expenses. The money deposited, as well as the earnings, is tax-deferred. The money can then be withdrawn to cover qualified medical expenses tax-free. Unused balances roll over from year to year.
Everyone (not just the self-employed or small businesses) with a qualified high deductible insurance plan is eligible for a tax-deductible HSA.